Pile-cutter knife



Julia 1", 1923* TQBACHOFEN FILE CUTTER KNIFE Filed April 4, 1922 Patented July 31, 1923.

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Y tea E C.

rrimnnonon BACHOFEN, or wus'r iioBoKnN, NEW JERSEY.

:PILIEl-CITTCP'TIEB. KNIFE.

Application filed April 4,

new and useful Improvements in Pile-Cut ter Knives, of which the following is a speci fication.

This invention relates to pile fabric cutting knives, as used in connection with looms for weaving and cutting the pile for floats, as formed over wires which extend 1n the d1- rection of the warp andabove the firmer woven base layer or portion of thefaloric.

One of the objects is to providea series of knives for cutting the loosely confined or floating-filler threads at a point adjacent the lay as the weaving progresses. v

Another purpose is to provide knive .blades'which are readily independently re- 7' movable from their holders for sharpening or other purposes.

- A further aim is in the production of afseries of knife holders, each being engaged with a, single wireoperated by the harness and which may be disengaged in an instant :without damage to either the holder or wire.

' A" still further object is to provide means for reciprocating or oscillating each blade in itsholder to produce a. positive slitting or cutting effect independentlyof the reed action sometimes relied upon in beating the filler threads at each'pick.

' With these ends in view the invention con.

sists in certain details ofv construction and arrangement of parts hereafter described in detail" and illustrated in the accompanying drawings forming a materialpartof this disclosure. and in which :F

Figure 1 is a plan view showing a fragmentary series of knives embodyingfthe invention. v

Figure 2 is an enlarged longitudinal sectional view taken on line 22 of Fig. 1.

Figure 8 is a similar sectional view but showing'th'e knife blade in a forward or cutting position.

Figure 4 is a side elevational view of the blade in detail. 7

Figure 5 is a perspective holder used therewith. I

Figure 6 is a transverse sectional view taken on line 6-6 of Fig. 2.

Throughout the several views of-the wires, designated by the numeral 20, will be underview of the stood by those skilled in the art to be the 1922. Serial No. 549,389.

- woven in wires, which pass between the dents of the reed and thence certain of the V heddles, beyond which they are tensione din any preferred manner, and are operated with the shed 0f the loo m for the. passage ofi the shuttle.

It is to be noted that' a singlefstrandof wire is used, not'do'ubled at any pointinits len gth,1ts free end extending beyond the knives to any preferred distance where it is convenient of access in connecting or disconnecting the knife. 7 1 Arranged on each s1de frame of the loom,

are brackets (not shown) in which isfixedly secured a transverse support rod 21 and-1a;

laterally movable rod 22,-'as will later bef seen,"isarrange'd in. the same plane. 1

- In this invention the ,holder, shown Fig. 5, is -formed from a symmetrical sheet- -metal blank bent toproduce two equal sides a 25 connected bya base 26 andhaving lee-- tween thema narrow uniform space 27.

.The upper edges of the sides may. be straight and. parallel with the base. but are preferably formed with recesses QSrenderingthe blade readily accessible. f

. 'The;-front;edge s 50 of the holder? are N;

formed obliquely downward, then concontinued forward at lesser angles 51 tov small convex curves .52 extending down to thebase 26, said base projecting outward to its curved termination and containing small open1ng347through which: one of, the

wires 20 may be engaged A circular opening 35 is formed through both of the holderf sides 2 5. at its rear fitting the rod QL'anda the rod 22- x The bar disposed so as torest onthe upper edges of the knives above the holdei slots 36. has luggs54 -at its ends on the bar 53 isoscillated.

slotted opening 36 nearthe'frontjreceives The knife blade 56 is formed with recess 57 in its lower edge 58, suited to rock on the rod QQi-and its upper edge 59 extends straight from the heel or'rear end 60.

to the rounded-point 61 from which the cutter blade 62extends obliquelyto one side of the recess 57, said edge 62 being hevelled toboth-sides, as at 63, wholly or partially along its length;

In operation, when the cutter blade 56 1 is-rocked or oscillated so that its upper edge 59 is substantially paralled with the base 26, the thread or threads 46 are moved upon the edge surfaces 51, as shown in Figure 2 and as the cutter blade is rocked into the position shown in Figure 3, they will be severed. At the same time the blade is moved rearwardly in its holder, due to the movement of the rod 22 as acted upon by the bar 53, giving a cutting effect that is positive in its operation.

7 As changes of construction could be made within the scope of the invention, it is in tended that all matter contained in the foregoing description or shown in the including a portion substantially parallel to its base, a pair of spaced supportrods passing through said holder, a knife blade having an' oblique cutting edge arranged in cooperative relation to the angle of said holder, said blade containing a' recess en gageable with one of said rods manner as to be supported by it, a fiat bar disposed transversely over said blade, lugs in such on said flat bar journalled on the last named rod, and means for oscillating said bar whereby' said knife is rocked upon its rod support;

2. A pile cutting device comprising a Y pair of support rods, a plurality of knife holders having trans-verse'openings suited to slidably engage said rods, the sides of said holders inclined downward at their advance ends, blades closely engaged in said holders, said blades being shaped to present their cutting edges outwardly beyond the edges of said holders or be retracted there within, means for reciprocating said blades relative to said holders, guard extensions on said holders adapted to guide material and maintain it in position to be severed upon the advance'ot said blades, and means in said holders for engaging longitudinal warp wires in the fabric to be cut.

3. A pile cutting device comprising a pair of support rods, a plurality of knife holders having transverse openings suited to slidably engage said rods, the sides of said holders inclining downward at their advance end, blades suited to operate in said holders, said blades rocking on one of said rods, means for oscillating said blades, cutting edges on said blades arranged in cooperative relation to the inclination of said holder edges, guard extensions on said holders adapted to maintaininaterial in the path of said blade, and means in said holders for engaging longitudinal warp wires in the fabric to be cut.

4:. A pile cutting device comprising a blade holder of U shaped cross section having an oblique end directed towards the pile, front and rear support rods for said holder, a blade in said holder oscillatably mounted on the front support rod, said blade having-an oblique straight cutting edge disposed in reverse relationto the oblique portion of said holder, and means for oscillating said blade whereby the cutting edge 'aised andlowered.

5. A pile cutting device comprising blade holder of U shaped cross section having an oblique end directed towards the pile, said holder having a slot in its side walls near its center, a rod movable in the ment oned slot, a knlie in said holder having arecess in its lower edge suited to en said rod, the cutting edge of said knife extending obliquely from the recess to its extreme upper corner, a bar resting on the upper edge of said knife over the slot in said holder, rigid connections between the ends of said bar and said rod, and means for rocking said bar whereby a combined rear- 'Wdld sliding and downwardly turning shear *DlOilOll is imparted to the cutting edge of said knife.

In witness whereof I have signed my name to this application.

THEODOR BACHGl-EEN. 

